The 2013 Wimbledon Championships will go done as the year of the upsets.
Some upsets, like Rafael Nadal losing in the first round, were more shocking than others.
Other upsets, like Sabine Lisicki's win over Serena Williams, were more thrilling than others.
Fans may relish the number of relative unknowns moving into the later rounds. However, eliminated stars are left to consider, "What if?"
What if Serena Williams broke Sabine Lisicki to go up 4-0 in the third?
Usually after a Grand Slam, it's the "also-rans" and the "upstarts" who are left to ponder the what ifs. But this Wimbledon fortnight, it's the stars, the perennial powerhouses, with the biggest what ifs.